TPS544C25: TPS544C25RVFT

Bhadresh Patel

Part Number: TPS544C25

We have used TPS544C25RVFT dc dc converter in our design but now we are faced issue in PGOOD pin which is output showing low but we are getting proper output voltage so please find below image and help to resolve this things ASAP.

We are not used SMBUS protocol in design so please ignore

Yellow mark pin we are getting low as per output it should be High.

over 4 years ago

0 Tomoya Ide over 4 years ago

TI__Genius 11396 points

Please check that it is not hitting any warning thresholds (e.g., Over-Temperature, Low-Side OC, High-Side OC, VOUT OV, VOUT UV) as they will cause PGOOD to go low while output is still operating.

Please note the PGOOD is an open-drain output, so it requires a pull-up resistor, which I don't see in your schematics. Also, the voltage at the PGOOD pin cannot exceed the absolute maximum rating of 7V.

0 Bhadresh Patel over 4 years ago in reply to Tomoya Ide

Prodigy 90 points

Thanks For quick response

We are not used I2C in our design for this DC DC converter so any other way to measurement of ( Over-Temperature, Low-Side OC, High-Side OC, VOUT OV, VOUT UV) ??

If yes so please let us know How to measure.

We have used pull up in our design which is mention in below image also that signal connected with pgood pin.

Please find attached both image.

0 Tomoya Ide over 4 years ago in reply to Bhadresh Patel

TI__Genius 11396 points

Can you please complete this calculator/checklists and send it to me for review?

7752.TPS544C25_Calculator_Checklist.xlsx

Power management

Power management forum

TPS544C25: TPS544C25RVFT